The 25121WF0271T4E is a chip resistor from Royal Ohm's Flameproof Series of resistors, which can safely be used in hazardous environments. It has a resistance value of 27.1 Ohms, is a 0.25W wire-wound resistor and is constructed using a flameproof epoxy coating. It is a axial leaded component, with a 1/4 inch diameter and 1/2 inch length. This resistor is suitable for lead-free soldering and passes UL 94V-0 flammability requirements.